The specimens from Washington County are paler than those from Garfield County, and this pallor indicates intergradation with the subspecies _P. p. olivaceus_. Of animals from the Aquarius Plateau, those from the eastern and southern localities are pale and have a marked suffusion of ochraceous in the upper parts, whereas those from the western and northern localities are extremely dark owing to a heavy suffusion of black in the upper parts. The skulls of animals from the Aquarius Plateau resemble those of _P. p. trumbullensis_ in the majority of diagnostic characters. In some few characters, nevertheless, the skulls resemble those of _P. p. olivaceus_, and in other characters are intermediate between these two named subspecies. In shape and size of the interparietal, in slightly longer nasals, and in slightly greater alveolar length of upper molariform teeth, animals from the Aquarius Plateau differ from either of the aforementioned subspecies. All characters considered, we deem it best to refer these specimens to the subspecies _P. p. trumbullensis_. _=Thomomys talpoides bridgeri=_ Merriam. Northern Pocket Gopher.--An adult female, Catalogue No. 25667 of the Museum of Natural History of the University of Kansas, skin with skull, was trapped, on 30 June 1948, 14 miles south and 2 miles east of Robertson, 9,300 feet, in Summit County, Utah, by James O. Lonnquist (original number 146). This is the first record of this subspecies from Utah, and raises to 37 the named kinds of pocket gophers known from Utah. _=Reithrodontomys megalotis megalotis=_ (Baird). Western Harvest Mouse.--Durrant (1952:295) reported no harvest mice from the Uinta Basin in northeastern Utah. One specimen, No. 10,239, was obtained from two miles east of Duchesne, Duchesne County. This specimen extends the known range in Utah 50 miles northward, and indicates that the harvest mouse of the subspecies _R. m. megalotis_ occurs throughout the Uinta Basin. _=Onychomys leucogaster pallescens=_ Merriam. Northern Grasshopper Mouse.--Hansen obtained specimens (in alcohol) from Kennedys Hole, junction of the White and Green rivers, Uintah County. The northernmost specimens available to Durrant (1952:328) were from one mile east of Greenriver, Grand County. These specimens from Uintah County extend the known range 80 miles to the north, and substantiate Durrant's conclusion that this subspecies occurs east of the Green and Colorado rivers.